SECTION 4
ADJUSTMENT
4.1 ADJUSTMENT PREPARATION
(1) There are 2 ways of adjusting this TV : One is with the REMOTE CONTROL UNIT and the other is the conventional
method using adjustment parts and components.
(2) The adjustment using the REMOTE CONTROL UNIT is made on the basis of the initial setting values. The setting values
which adjust the screen to the optimum condition can be different from the initial setting values.
(3) Make sure that connection is correctly made AC to AC power source.
(4) Turn on the power of the TV and measuring instruments for warning up for at least 30 minutes before starting adjustments.
(5) If the receive or input signal is not specified, use the most appropriate signal for adjustment.
(6) Never touch the parts (such as variable resistors, transformers and condensers) not shown in the adjustment items of this service
adjustment.
(7) Preparation for adjustment. Unless otherwise specified in the adjustment items, preset the following functions with the REMOTE
CONTROL UNIT.
ItemPreset value
VIDEO STATUSSTANDARD
TINT, COLOR, PICTURE, BRIGHT, DETAIL0
BASS, TREBLE, BALANCECenter
MTSSTEREO
4.2 MEASURING INSTRUMENT AND FIXTURES
(1) DC voltmeter (or digital voltmeter)
(2) Oscilloscope
(3) Frequency counter
(4) Signal generator (Pattern generator) [NTSC]
(5) TV audio multiplex signal generator
(6) Remote control unit
4.3 ADJUSTMENT ITEMS
?CHECK ITEM?VIDEO CIRCUIT
? B1 POWER SUPPLY check? WHITE BALANCE(High Light & Low Light) adjustment
? SUB BRIGHT adjustment
?TUNER / IF CIRCUIT? SUB CONTRAST adjustment
? IF VCO adjustment? SUB COLOR adjustment
? RF. AGC adjustment? SUB TINT adjustment
?FOCUS
? FOCUS adjustment?MTS CIRCUIT
?DEFLECTION CIRCUIT? MTS INPUT LEVEL adjustment
? V. SIZE / V. POSITION (4:3) adjustment? MTS SEPARATION adjustment
? V. SIZE / V. POSITION (16:9) adjustment?HIGH VOLTAGE HOLD DOWN CIRCUIT
? H. POSITION / H. SIZE / SIDE PIN [ (4:3) & (16:9) ] adjustment
(No.52153)1-15 |
ACEC
